CN210768677U

CN210768677U - Coiled tubing shearing mechanism

Info

Publication number: CN210768677U
Application number: CN201921707082.8U
Authority: CN
Inventors: 郭新维; 焦文夫; 郝力博; 王建磊; 朱召召; 林国猛
Original assignee: Xinjiang Petroleum Administration Co ltd; China National Petroleum Corp
Current assignee: Xinjiang Petroleum Administration Co ltd; China National Petroleum Corp
Priority date: 2019-10-12
Filing date: 2019-10-12
Publication date: 2020-06-16
Anticipated expiration: 2029-10-12

Abstract

The utility model relates to an oil pipe salvages technical field, is a coiled tubing shearing mechanism, including top connection, crossover sub, outer barrel, salvage slips, slip seat, shear pin, shear slip, spiral inner tube, pin, spiral urceolus and guide shoe, the top connection lower extreme outside is in the same place with the inboard fixed mounting in crossover sub upper end, and the crossover sub lower extreme outside is in the same place with the inboard fixed mounting in outer barrel upper end. The utility model has reasonable and compact structure and ingenious conception, and the pin is matched with the rotary groove to lead the spiral outer cylinder to rotate relative to the spiral inner cylinder, thereby leading the guide shoe to lead the top of the fish to rotate and to the interior of the fishing tool; the lower end of the descending fishing slip is contracted to clamp the fish top through the second taper hole; the coiled tubing is salvaged through the salvage slips, and the lower end of the descending shear slip is contracted through the first taper hole to clamp the coiled tubing to be salvaged; the clamped coiled tubing is sheared through the shearing slips, and the shearing slips have the advantages of being efficient, stable, time-saving and labor-saving.

Description

Coiled tubing shearing mechanism

Technical Field

The utility model relates to an oil pipe salvages technical field, is a coiled tubing shearing mechanism.

Background

Along with popularization and application of the coiled tubing in the field of oil and gas downhole operation, the coiled tubing is applied more on an oil and gas field, and meanwhile, more and more coiled tubing are broken and then clamped in a well and other downhole complex conditions occur. Because tools and operation experiences for complex condition processing such as coiled tubing unfreezing and fishing are few in the current operation field, the tools and the method are limited in the complex processing, the processing is passive, and the success rate is low.

Disclosure of Invention

The utility model provides a coiled tubing shearing mechanism has overcome above-mentioned prior art not enough, and it can effectively solve the problem that current coiled tubing card can't be salvaged after going into in the well.

The technical scheme of the utility model is realized through following measure: a continuous oil pipe shearing device comprises an upper joint, a conversion joint, an outer cylinder, a fishing slip, a slip seat, a shear pin, a shearing slip, a spiral inner cylinder, a pin, a spiral outer cylinder and a guide shoe, wherein the outer side of the lower end of the upper joint is fixedly installed with the inner side of the upper end of the conversion joint; the middle part of the outer cylinder body is provided with a fishing and cutting channel which is communicated up and down, the fishing and cutting channel comprises a first straight hole, a first taper hole and a second straight hole which are communicated in sequence from top to bottom, and the first taper hole is a taper hole with a large top and a small bottom; a slip seat is fixedly arranged in the first straight hole corresponding to the inner side position of the upper part of the outer barrel through a shear pin, a second through hole which is communicated up and down is arranged in the middle of the slip seat, the second through hole is a taper hole with a big top and a small bottom, a salvaging slip with a lower end seat arranged on the inner side of the upper part of the second through hole is arranged on the inner side of the upper part of the outer barrel, the inner side of the upper part of the salvaging slip can be radially outwards expanded when being subjected to outwards extrusion force, the outer side of the lower part of the salvaging slip can be radially inwards contracted when, a shearing slip with a lower end seat positioned on the inner side of the upper part of the first taper hole is arranged in the first taper hole corresponding to the inner side of the lower part of the outer barrel, the outer side of the lower part of the shearing slip can contract inwards in the radial direction when being subjected to inward extrusion force, shearing teeth are arranged on the inner side of the lower part of the shearing slip, the shearing slip is positioned below the slip seat, and the outer diameter of the upper end of the shearing slip is larger than the inner diameter of the lower end of the slip seat; at least one pin is fixedly installed on the outer side of the upper portion of the spiral outer barrel, the axis of the pin is perpendicular to that of the spiral outer barrel, a rotating groove enabling the rotating pin to move up and down in the rotating groove is formed in the outer side of the spiral inner barrel, the rotating groove is spiral, and the inner end of the pin is located in the rotating groove.

The following are further optimization or/and improvement of the technical scheme of the utility model:

the salvaging slips can comprise a conical cylinder and a straight cylinder, the conical cylinder is in a hollow round platform shape with a small upper part and a large lower part, the straight cylinder is in a hollow cylindrical shape, the lower end of the conical cylinder and the upper end of the straight cylinder are fixedly installed together, the upper end of the salvaging slips is evenly provided with at least three upper long openings with lower ends positioned on the upper part of the straight cylinder along the circumference, and the lower end of the salvaging slips corresponding to the position between every two adjacent upper long openings is provided with a lower long opening with upper ends positioned on the lower part of the conical cylinder.

The shearing slips can be hollow cylindrical, and the lower end of the shearing slips is evenly provided with at least three strip openings with the upper ends positioned in the middle of the shearing slips along the circumference.

Two pins can be fixedly arranged on the outer side of the upper part of the spiral outer barrel.

The outer side of the lower end of the upper joint can be fixedly installed together with the inner side of the upper end of the adapter through threaded connection, the outer side of the lower end of the adapter can be fixedly installed together with the inner side of the upper end of the outer cylinder through threaded connection, the outer side of the lower end of the outer cylinder can be fixedly installed together with the inner side of the upper end of the spiral inner cylinder through threaded connection, and the outer side of the lower end of the spiral outer cylinder can be fixedly installed together with the inner side of the upper.

The utility model has reasonable and compact structure and ingenious conception, and the pin is matched with the rotary groove to lead the spiral outer cylinder to rotate relative to the spiral inner cylinder, thereby leading the guide shoe to lead the top of the fish to rotate and to the interior of the fishing tool; detecting whether the fish is salvaged and gripped or not through the change of the ground pump pressure after the plugging steel ball goes upward and is seated in the first taper hole; the lower end of the descending fishing slip is contracted to clamp the fish top through the second taper hole; the coiled tubing is salvaged through the salvage slips, and the coiled tubing fishing device has the advantages of being efficient, stable, time-saving and labor-saving.

Drawings

Fig. 1 is a schematic sectional view of the preferred embodiment of the present invention.

FIG. 2 is a schematic view of the spiral inner barrel of FIG. 1.

The codes in the figures are respectively: the fishing slip comprises a top joint 1, a conversion joint 2, an outer barrel 3, a fishing slip 4, a slip seat 5, a shear pin 6, a shear slip 7, a spiral inner barrel 8, a first taper hole 9, a pin 10, a spiral outer barrel 11, a guide shoe 12, a second taper hole 13 and a rotating groove 14.

Detailed Description

The utility model discloses do not receive the restriction of following embodiment, can be according to the utility model discloses a technical scheme and actual conditions determine concrete implementation.

In the present invention, for convenience of description, the description of the relative position relationship of the components is described according to the layout mode of the attached drawing 1 in the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of fig. 1 of the specification.

The invention will be further described with reference to the following examples and drawings:

as shown in the attached figures 1 and 2, the continuous oil pipe shearing device comprises an upper joint 1, a conversion joint 2, an outer cylinder 3, a fishing slip 4, a slip seat 5, a shear pin 6, a shearing slip 7, a spiral inner cylinder 8, a pin 10, a spiral outer cylinder 11 and a guide shoe 12, wherein the outer side of the lower end of the upper joint 1 is fixedly installed with the inner side of the upper end of the conversion joint 2, the outer side of the lower end of the conversion joint 2 is fixedly installed with the inner side of the upper end of the outer cylinder 3, the outer side of the lower end of the outer cylinder 3 is fixedly installed with the inner side of the upper end of the spiral inner cylinder 8, the spiral outer cylinder 11 is sleeved on the outer side of the lower part of the spiral; the middle part of the outer cylinder body 3 is provided with a fishing and cutting channel which is communicated up and down, the fishing and cutting channel comprises a first straight hole, a first taper hole 9 and a second straight hole which are communicated in sequence from top to bottom, and the first taper hole 9 is a taper hole with a large top and a small bottom; a slip seat 5 is fixedly arranged in a first straight hole corresponding to the inner side position of the upper part of the outer barrel 3 through a shear pin 6, a second taper hole 13 which is communicated up and down is arranged in the middle of the slip seat 5, the second taper hole 13 is a taper hole with a big top and a small bottom, a fishing slip 4 with a lower end seat at the inner side of the upper part of the second taper hole 13 is arranged at the inner side of the upper part of the outer barrel 3, the inner side of the upper part of the fishing slip 4 can radially expand outwards when being extruded outwards, the outer side of the lower part of the fishing slip 4 can radially contract inwards when being extruded inwards, an annular slip tooth is arranged at the inner side of the fishing slip 4, a shear slip 7 with a lower end seat at the inner side of the upper part of the first taper hole 9 is arranged in a first taper hole 9 corresponding to the inner side position of the lower part of the outer barrel 3, the outer side of the lower part of the shear slip, the outer diameter of the upper end of the shearing slip 7 is larger than the inner diameter of the lower end of the slip seat 5; at least one pin 10 is fixedly installed on the outer side of the upper portion of the spiral outer cylinder 11, the axis of the pin 10 is perpendicular to the axis of the spiral outer cylinder 11, a rotating groove 14 enabling the rotating pin to move up and down in the rotating groove is formed in the outer side of the spiral inner cylinder 8, the rotating groove 14 is spiral, and the inner end of the pin 10 is located in the rotating groove 14.

According to requirements, the fishing slip 4 is a known technology, the upper part and the lower part of the fishing slip 4 are of split elastic structures, the inner side of the lower part of the fishing slip 4 is provided with an annular slip insert, the inner side of the upper part of the fishing slip 4 can be radially outwards expanded when being subjected to outwards extrusion force, and the outer side of the lower part of the fishing slip 4 can be radially inwards contracted when being subjected to inwards extrusion force; the shearing slip 7 is a well-known technology, the lower part of the shearing slip 7 is of a split elastic structure, the inner side of the lower part of the shearing slip 7 is provided with shearing teeth, and the outer side of the lower part of the shearing slip 7 can contract inwards in the radial direction when being subjected to inward extrusion force. When in use, the utility model is connected to the lower end of the prior known fishing pipe column, and is fixedly arranged with the lower end of the fishing pipe column through the upper joint 1, and then the fishing pipe column is lowered to start fishing operation; firstly, after the guide shoe 12 contacts the fish top, the pin 10 moves upwards in the rotating groove 14, so that the spiral outer cylinder 11 rotates relative to the spiral inner cylinder 8, and the guide shoe 12 rotates along with the spiral outer cylinder 11, and the fish top is guided into the guide shoe 12; then, after the guide shoe 12 is introduced into the fish top, the fishing pipe column is lowered down, so that the fish top sequentially passes through the spiral outer cylinder 11, the spiral inner cylinder 8, the outer cylinder 3, the shearing slip 7, the slip seat 5 and the fishing slip 4, at this time, the fishing pipe column is continuously lowered down, the fish top continuously goes upward, when the top of the fish contacts the inner side of the upper end of the fishing slip 4 to generate outward extrusion force to the fishing slip 4, the upper end of the fishing slip 4 expands outwards in the radial direction, the falling fish is gripped by the self elastic force of the upper end of the fishing slip 4 to provide initial pretightening force, under the action of the pre-tightening force, the fishing pipe column is lifted, the upper end of the fishing slip 4 grasps the outer wall of the fish and moves downwards relative to the outer cylinder 3, in the process that the fishing slip 4 moves downwards, the lower end of the fishing slip 4 is squeezed by the conical surface of the second taper hole 13 and then contracts inwards, the outer wall of the fish is tightly gripped by the annular slip teeth at the lower part of the fishing slip 4, and the fishing pipe column is continuously lifted to finish the fishing operation of the continuous oil pipe; finally, if the coiled tubing is stuck in the well and the fishing pipe column can not be lifted, the fishing pipe column is continuously lowered until the target position needing to be cut, namely the position of the clamping point, the fishing pipe column is lifted, so that the annular slip teeth at the lower part of the fishing slip 4 bite the outer wall of the fallen fish again, at the moment, the fishing pipe column is continuously lifted, the lifting load is further increased, when the slip seat 5 is stressed downwards to reach the shearing force of the shearing nail 6, the shearing nail 6 is sheared, the slip seat 5 continues to push the shearing slip 7 downwards to move, the lower end of the shearing slip 7 is extruded by the conical surface of the first conical hole 9 and then contracts inwards, the shearing teeth act on the outer wall of the coiled tubing to be salvaged, the shearing force of the shearing teeth is in direct proportion to the lifting load, the fishing pipe column is continuously lifted to increase the lifting load until the coiled tubing to be salvaged is sheared, and therefore fishing operation of the coiled tubing to be fished is completed.

The coiled tubing shearing device can be further optimized or/and improved according to actual needs:

as shown in the attached figures 1 and 2, the salvaging slips 4 comprises a conical cylinder and a straight cylinder, the conical cylinder is in a hollow round platform shape with a small upper part and a big lower part, the straight cylinder is in a hollow cylindrical shape, the lower end of the conical cylinder is fixedly installed with the upper end of the straight cylinder, the upper end of the salvaging slips 4 is evenly provided with at least three upper long openings with the lower ends positioned on the upper part of the straight cylinder along the circumference, and the lower end of the salvaging slips 4 corresponding to the position between every two adjacent upper long openings is provided with a lower long opening with the upper end positioned on the lower part of the. In the using process, the upper part of the salvaging slips 4 forms a plurality of split elastic structures by arranging the upper long opening on the conical cylinder, so that the inner side of the upper part of the salvaging slips 4 can be radially expanded outwards when being subjected to outwards extrusion force; the lower part of the salvaging slips 4 forms a plurality of split elastic structures by arranging the lower long opening on the straight column barrel, so that the outer side of the lower part of the salvaging slips 4 can radially contract inwards when being subjected to inward extrusion force; thereby completing the fishing operation of the coiled tubing through the annular slip teeth on the inner side of the fishing slip 4.

As shown in attached figures 1 and 2, the shearing slip 7 is hollow and cylindrical, and at least three strip openings with upper ends located in the middle of the shearing slip 7 are uniformly distributed at the lower end of the shearing slip 7 along the circumference. In the using process, the lower part of the shearing slip 7 forms a plurality of split elastic structures by arranging the strip openings on the shearing slip 7, so that the outer side of the lower part of the shearing slip 7 can contract inwards in the radial direction when being subjected to inwards extrusion force; thereby completing the shearing operation of the coiled tubing by shearing the shearing teeth inside the slips 7.

As shown in fig. 1 and 2, two pins 10 are fixedly mounted on the outer side of the upper part of the spiral outer cylinder 11. In the use process, the arrangement improves the stability of the pin 10 moving up and down in the rotating groove 14, so that the spiral outer cylinder 11 can rotate relative to the spiral inner cylinder 8 more stably and reliably.

As shown in the attached drawings 1 and 2, the outer side of the lower end of the upper joint 1 is fixedly installed with the inner side of the upper end of the adapter 2 through threaded connection, the outer side of the lower end of the adapter 2 is fixedly installed with the inner side of the upper end of the outer cylinder 3 through threaded connection, the outer side of the lower end of the outer cylinder 3 is fixedly installed with the inner side of the upper end of the spiral inner cylinder 8 through threaded connection, and the outer side of the lower end of the spiral outer cylinder 11 is fixedly installed with the inner side of the upper end of the. In the use, be convenient for through such setting the utility model discloses dismantlement and installation between each part.

Above technical feature constitutes the utility model discloses a best embodiment, it has stronger adaptability and best implementation effect, can increase and decrease unnecessary technical feature according to actual need, satisfies the demand of different situation.

Claims

1. A continuous oil pipe shearing device is characterized by comprising an upper joint, a conversion joint, an outer barrel, a salvaging slip, a slip seat, a shear pin, a shearing slip, a spiral inner barrel, a pin, a spiral outer barrel and a guide shoe, wherein the outer side of the lower end of the upper joint is fixedly installed with the inner side of the upper end of the conversion joint, the outer side of the lower end of the conversion joint is fixedly installed with the inner side of the upper end of the outer barrel, the outer side of the lower end of the outer barrel is fixedly installed with the inner side of the upper end of the spiral inner barrel, the outer side of the lower part of the spiral inner barrel is sleeved with the; the middle part of the outer cylinder body is provided with a fishing and cutting channel which is communicated up and down, the fishing and cutting channel comprises a first straight hole, a first taper hole and a second straight hole which are communicated in sequence from top to bottom, and the first taper hole is a taper hole with a large top and a small bottom; a slip seat is fixedly arranged in the first straight hole corresponding to the inner side position of the upper part of the outer barrel through a shear pin, a second through hole which is communicated up and down is arranged in the middle of the slip seat, the second through hole is a taper hole with a big top and a small bottom, a salvaging slip with a lower end seat arranged on the inner side of the upper part of the second through hole is arranged on the inner side of the upper part of the outer barrel, the inner side of the upper part of the salvaging slip can be radially outwards expanded when being subjected to outwards extrusion force, the outer side of the lower part of the salvaging slip can be radially inwards contracted when, a shearing slip with a lower end seat positioned on the inner side of the upper part of the first taper hole is arranged in the first taper hole corresponding to the inner side of the lower part of the outer barrel, the outer side of the lower part of the shearing slip can contract inwards in the radial direction when being subjected to inward extrusion force, shearing teeth are arranged on the inner side of the lower part of the shearing slip, the shearing slip is positioned below the slip seat, and the outer diameter of the upper end of the shearing slip is larger than the inner diameter of the lower end of the slip seat; at least one pin is fixedly installed on the outer side of the upper portion of the spiral outer barrel, the axis of the pin is perpendicular to that of the spiral outer barrel, a rotating groove enabling the rotating pin to move up and down in the rotating groove is formed in the outer side of the spiral inner barrel, the rotating groove is spiral, and the inner end of the pin is located in the rotating groove.

2. The coiled tubing shearing device as claimed in claim 1, wherein the fishing slip comprises a conical cylinder and a straight cylinder, the conical cylinder is in a hollow circular truncated cone shape with a small upper part and a large lower part, the straight cylinder is in a hollow cylindrical shape, the lower end of the conical cylinder is fixedly mounted with the upper end of the straight cylinder, at least three upper long notches with lower ends located at the upper part of the straight cylinder are uniformly distributed at the upper end of the fishing slip along the circumference, and lower long notches with upper ends located at the lower part of the conical cylinder are arranged at the lower ends of the fishing slip corresponding to the positions between every two adjacent upper long notches.

3. The coiled tubing shearing device as claimed in claim 1 or 2, wherein the shearing slip is hollow and cylindrical, and the lower end of the shearing slip is uniformly provided with at least three strip openings with the upper ends positioned in the middle of the shearing slip along the circumference.

4. The coiled tubing shearing device as claimed in claim 1 or 2, wherein two pins are fixedly mounted on the outer side of the upper part of the spiral outer cylinder.

5. The coiled tubing shearing device as claimed in claim 3, wherein two pins are fixedly mounted on the outer side of the upper part of the spiral outer cylinder.

6. The coiled tubing shearing device as claimed in claim 1, 2 or 5, wherein the outer side of the lower end of the upper joint is fixedly connected with the inner side of the upper end of the adapter by a screw thread, the outer side of the lower end of the adapter is fixedly connected with the inner side of the upper end of the outer cylinder by a screw thread, the outer side of the lower end of the outer cylinder is fixedly connected with the inner side of the upper end of the spiral inner cylinder by a screw thread, and the outer side of the lower end of the spiral outer cylinder is fixedly connected with the inner side of the upper end of.

7. The coiled tubing shearing device as claimed in claim 3, wherein the outer side of the lower end of the upper joint is fixedly connected with the inner side of the upper end of the adapter through a thread, the outer side of the lower end of the adapter is fixedly connected with the inner side of the upper end of the outer cylinder through a thread, the outer side of the lower end of the outer cylinder is fixedly connected with the inner side of the upper end of the spiral inner cylinder through a thread, and the outer side of the lower end of the spiral outer cylinder is fixedly connected with the inner side of the upper end of the guide shoe.

8. The coiled tubing shearing device as claimed in claim 4, wherein the outer side of the lower end of the upper joint is fixedly connected with the inner side of the upper end of the adapter through a thread, the outer side of the lower end of the adapter is fixedly connected with the inner side of the upper end of the outer cylinder through a thread, the outer side of the lower end of the outer cylinder is fixedly connected with the inner side of the upper end of the spiral inner cylinder through a thread, and the outer side of the lower end of the spiral outer cylinder is fixedly connected with the inner side of the upper end of the guide shoe.